Update gl2.h and gl2ext.h headers from Khronos.

gpu/command_buffer/build_gles2_cmd_buffer.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """code generator for GLES2 command buffers."""
 
 import os
 import os.path
 import sys
@@ skipping 6071 matching lines @@
     file.Close()
 
   def WriteGLES2ToPPAPIBridge(self, filename):
     """Connects GLES2 helper library to PPB_OpenGLES2 interface"""
 
     file = CWriter(filename)
     file.Write(_LICENSE)
     file.Write(_DO_NOT_EDIT_WARNING)
 
     file.Write("#include <GLES2/gl2.h>\n")
+    file.Write("#include <GLES2/gl2ext.h>\n")
     file.Write("#include \"ppapi/lib/gl/gles2/gl2ext_ppapi.h\"\n\n")
 
     for func in self.original_functions:
       if not func.InAnyPepperExtension():
         continue
 
       interface = self.interface_info[func.GetInfo('pepper_interface') or '']
 
       file.Write("%s GL_APIENTRY gl%s(%s) {\n" %
                  (func.return_type, func.name,
@@ skipping 143 matching lines @@
     gen.WriteCommonUtilsImpl("common/gles2_cmd_utils_implementation_autogen.h")
 
   if gen.errors > 0:
     print "%d errors" % gen.errors
     return 1
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))